CN114244441A - Optical communication module for power transmission line - Google Patents
Optical communication module for power transmission line Download PDFInfo
- Publication number
- CN114244441A CN114244441A CN202111321691.1A CN202111321691A CN114244441A CN 114244441 A CN114244441 A CN 114244441A CN 202111321691 A CN202111321691 A CN 202111321691A CN 114244441 A CN114244441 A CN 114244441A
- Authority
- CN
- China
- Prior art keywords
- signal
- optical
- circuit
- differential
- digital signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
Abstract
The application provides an optical communication module for transmission line, can strengthen signal strength and improve signal transmission's sensitivity. The optical communication module includes: the optical control unit performs protocol conversion on the second digital signal according to a communication protocol of an optical fiber communication network to obtain an electric signal corresponding to the second digital signal, outputs the electric signal to the optical drive unit, and drives the TOSA to output the optical signal according to the electric signal.
Description
Technical Field
The present invention relates to the field of power grid communication technologies, and in particular, to an optical communication module for a power transmission line.
Background
The power distribution information acquisition system plays a very important role in monitoring the power distribution network. For example, in many power distribution network sites, the power distribution information acquisition system needs to acquire and analyze data of field devices of the power distribution network at regular time, so as to know the basic conditions of the field devices in time and further monitor the whole power distribution network in real time.
In the prior art, a General Packet Radio Service (GPRS) technology is mostly adopted for the power distribution information acquisition system, and when information is transmitted through a GPRS communication network, the transmitted information needs to be diffused into the atmosphere in an electromagnetic wave manner, so that the GPRS communication network is easily subjected to electromagnetic interference, is not high in stability, and has low transmission speed and the like.
Therefore, the optical communication mode is applied to the power distribution information acquisition system. However, the optical communication modules used at present are not sensitive to signals.
Disclosure of Invention
The application provides an optical communication module for transmission line, improves the sensitivity of optical signal transmission through strengthening digital signal intensity among the optical communication system.
In a first aspect, an optical communication module for a power transmission line is provided, where the optical communication system includes: the power distribution system comprises a power distribution acquisition terminal, a light receiving assembly ROSA, a limiting amplification circuit unit, a light control unit, a light driving unit and a light emitting assembly TOSA which are sequentially connected, wherein the power distribution acquisition terminal converts acquired power distribution information analog signals into first digital signals and sends the first digital signals to the light receiving assembly ROSA, the light receiving assembly ROSA receives the first digital signals and sends the first digital signals to the limiting amplification circuit unit, the limiting amplification circuit unit receives the first digital signals and amplifies and adjusts the first digital signals to obtain second digital signals, the limiting amplification circuit unit sends the second digital signals to the light control unit, the light control unit receives the second digital signals and carries out protocol conversion on the second digital signals according to a communication protocol of an optical fiber communication network to obtain electric signals corresponding to the second digital signals, the optical control unit outputs the electrical signal to the optical driving unit, and the optical driving unit drives the optical transmitter optical subassembly TOSA to output an optical signal according to the electrical signal.
Therefore, the digital signal strength is enhanced by providing a limiting amplifier circuit between the optical receiver assembly ROSA and the optical control unit, thereby improving the sensitivity of optical signal transmission.
With reference to the first aspect, in some implementations of the first aspect, the limiting amplifier circuit unit includes a first differential amplifier circuit, a second differential amplifier circuit, a signal detection circuit, and a bias control circuit, where the first differential amplifier circuit amplifies the input first digital signal and inputs the amplified first digital signal as a second differential signal to the second differential amplifier circuit, the second differential amplifier circuit amplifies the second differential signal to obtain the second digital signal, the signal detection circuit detects the second differential signal to obtain a detection result, and the bias control circuit adjusts a voltage of the first differential amplifier circuit according to the detection result.
With reference to the first aspect, in certain implementations of the first aspect, the first differential amplification circuit includes a first signal input, a second signal input, a first signal output, and a second signal output; the second differential amplifying circuit comprises a third signal input end, a fourth signal input end, a third signal output end and a fourth signal output end, wherein the first signal output end is connected with the third signal input end, and the second signal output end is connected with the fourth signal input end;
the first signal output end is connected with the signal detection circuit through a first branch circuit, and the first branch circuit comprises a first capacitor;
the second signal output end is connected with the signal detection circuit through a second branch circuit, and the second branch circuit comprises a second capacitor;
the output end of the signal detection circuit is connected with the bias control circuit, and the output end of the bias control circuit is connected with the first differential amplification circuit.
With reference to the first aspect, in certain implementations of the first aspect, the signal detection circuit detects an amplitude of the second differential signal; the signal detection circuit determines a judgment result according to the amplitude and a preset threshold value; and the signal detection circuit sends the judgment result to the bias control circuit.
With reference to the first aspect, in certain implementations of the first aspect, the signal detection circuit is specifically configured to: when the amplitude is greater than or equal to the preset threshold value, the judgment result is a first value, and the first value represents a detected signal; or, when the amplitude is smaller than the preset threshold, the judgment result is a second value, and the second value indicates that no signal is detected.
With reference to the first aspect, in some implementations of the first aspect, when the determination result is the second value, the amplification factor of the second differential amplifier circuit is smaller than the amplification factor of the second differential amplifier circuit when the determination result is the first value.
With reference to the first aspect, in certain implementations of the first aspect, the optical transmitter optical subassembly TOSA is connected to an optical splitter and an optical path control switch, the optical splitter is connected to a plurality of optical links through the optical path control switch, and the optical control unit is further configured to perform optical communication by controlling the optical path control switch to select one optical link among the plurality of optical links.
Therefore, the rotation of the optical communication link is increased through the optical splitter and the optical path control switch, and the faults of the optical communication system in the communication process are reduced.
Drawings
Fig. 1 is a schematic structural block diagram of an optical communication system for a power transmission line according to an embodiment of the present application;
fig. 2 is a schematic block diagram of a limiting amplification circuit according to an embodiment of the present application;
fig. 3 is a schematic structural block diagram of an optical communication system for a power transmission line according to an embodiment of the present application.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solution in the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural block diagram of an optical communication module for a power transmission line of the present embodiment. As shown in fig. 1, the optical communication module includes a power distribution collection terminal, a light receiving assembly ROSA, a limiting amplification circuit unit, an optical control unit, an optical driving unit, and a light emitting assembly TOSA, which are sequentially connected, wherein the power distribution collection terminal converts a collected power distribution information analog signal into a first digital signal and sends the first digital signal to the light receiving assembly ROSA, the light receiving assembly ROSA receives the first digital signal and sends the first digital signal to the limiting amplification circuit unit, the limiting amplification circuit unit receives the first digital signal and amplifies and adjusts the first digital signal to obtain a second digital signal, the limiting amplification circuit unit sends the second digital signal to the optical control unit, and the optical control unit receives the second digital signal and performs protocol conversion on the second digital signal according to a communication protocol of an optical fiber communication network to obtain the second digital signal And the optical control unit outputs the electric signal to the optical drive unit, and the optical drive drives the optical transmitter optical subassembly TOSA to output an optical signal according to the electric signal.
Therefore, the digital signal strength is enhanced by providing a limiting amplifier circuit between the optical receiver assembly ROSA and the optical control unit, thereby improving the sensitivity of optical signal transmission.
It should be understood that the number of the power distribution acquisition terminals can be multiple, and the application does not limit the number of the power distribution acquisition terminals.
For a clearer understanding of the present application, the limiting amplification circuit unit is described in detail below. Fig. 2 is a schematic block diagram of a limiter amplifier circuit according to an embodiment of the present invention, and as shown in fig. 2, the limiter amplifier circuit unit 10 includes a first differential amplifier circuit 11, a second differential amplifier circuit 12, a signal detection circuit 13, and a bias control circuit 14, where the first differential amplifier circuit 11 amplifies the input first digital signal and inputs the amplified first digital signal as a second differential signal to the second differential amplifier circuit 12, the second differential amplifier circuit 12 amplifies the second differential signal to obtain the second digital signal, the signal detection circuit 13 detects the second differential signal to obtain a detection result, and the bias control circuit 14 adjusts a voltage of the first differential amplifier circuit 11 according to the detection result.
Optionally, the first differential amplifying circuit includes a first signal input terminal, a second signal input terminal, a first signal output terminal, and a second signal output terminal; the second differential amplifying circuit comprises a third signal input end, a fourth signal input end, a third signal output end and a fourth signal output end, wherein the first signal output end is connected with the third signal input end, and the second signal output end is connected with the fourth signal input end; the first signal output end is connected with the signal detection circuit through a first branch circuit, and the first branch circuit comprises a first capacitor; the second signal output end is connected with the signal detection circuit through a second branch circuit, and the second branch circuit comprises a second capacitor; the output end of the signal detection circuit is connected with the bias control circuit, and the output end of the bias control circuit is connected with the first differential amplification circuit.
Optionally, the signal detection circuit detects an amplitude of the second differential signal; the signal detection circuit determines a judgment result according to the amplitude and a preset threshold value; and the signal detection circuit sends the judgment result to the bias control circuit.
Optionally, the signal detection circuit is specifically configured to: when the amplitude is greater than or equal to the preset threshold value, the judgment result is a first value, and the first value represents a detected signal; or, when the amplitude is smaller than the preset threshold, the judgment result is a second value, and the second value indicates that no signal is detected.
Optionally, when the determination result is the second value, the amplification factor of the second differential amplifier circuit is smaller than the amplification factor of the second differential amplifier circuit when the determination result is the first value.
Specifically, the first differential amplifier circuit 11 includes the first signal input terminal 111, the second signal input terminal 112, the first signal output terminal 113, and the second signal output terminal 114. The first signal input terminal 111 is inputted with an input signal Vin1, and Vin1 may be a positive pole of the optical receiving module ROSA. The second signal input terminal 112 is inputted with an input signal Vin2, and Vin1 may be a cathode of the optical receiver assembly ROSA. The input signal Vin1 and the input signal Vin2 are referred to as a first differential signal. The first signal output terminal 113 amplifies the input signal Vin1 to output a signal Vout 1. The second signal output terminal 114 amplifies the input signal Vin2 and outputs an output signal Vout 2. The output signal Vout1 and the output signal Vout2 are referred to as a second differential signal. The first differential amplifier circuit 11 adjusts the difference between the dc voltage components of the first differential signal as a voltage offset.
Second differential amplifying circuit 12 the second differential amplifying circuit includes a third signal input terminal 121, a fourth signal input terminal 122, a third signal output terminal 123 and a fourth signal output terminal 124. The third signal input terminal 121 is inputted with the input signal Vin3, the input signal Vin3 is the output signal Vout 1. The fourth signal input terminal 122 is inputted with an input signal Vin4, the input signal Vin4 is the output signal Vout 2. The third signal output terminal 123 outputs an output signal Vout 3. The fourth signal output terminal 124 outputs an output signal Vout 4. The second differential amplifier circuit 12 amplifies the second differential signal at an amplification factor corresponding to a difference between dc voltage components of the second differential signal.
The signal detection circuit 13 detects the amplitude of the second differential signal, determines whether the amplitude is larger than a preset threshold, determines that a signal is detected when the amplitude of the second differential signal larger than or equal to the preset threshold is detected, and outputs the determination result to the bias control circuit 14. When the amplitude of the second differential signal equal to or smaller than the preset threshold is detected, the signal detection circuit 13 determines that no signal is detected, and outputs the determination result to the bias control circuit 14. The bias control circuit 14 controls the voltage bias of the first differential amplifier circuit 11 based on the determination result of the signal detection circuit 13.
Optionally, the optical transmitter assembly TOSA is connected to an optical splitter and an optical path control switch, the optical splitter is connected to the plurality of optical links through the optical path control switch, and the optical control unit is further configured to control the optical path control switch to select one optical link from the plurality of optical links for optical communication. As shown in fig. 3, fig. 3 is a schematic structural block diagram of an optical communication system for a power transmission line according to an embodiment of the present application. Other components in fig. 3 may refer to the above description, and are not described herein again to avoid redundancy.
Specifically, an optical splitter and an optical path control switch are provided in the optical transmitter module TOSA. The optical splitter is connected to the plurality of optical communication links for splitting the optical signal into multiple paths. The optical path control switch may include a plurality of control switches, the plurality of control switches are disposed on the plurality of optical links in a one-to-one correspondence manner, and are used to control whether the plurality of optical links are switched on in a one-to-one correspondence manner, and the optical control unit selects one optical link from the plurality of optical links for optical communication through the optical control switch, so as to reduce a fault generated in the communication process by the optical communication module.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer.
In the embodiments provided in the present invention, it should be understood that the disclosed system and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one module.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. An optical communication module for a power transmission line, comprising:
the power distribution acquisition terminal, the light receiving assembly ROSA, the amplitude limiting amplification circuit unit, the light control unit, the light driving unit and the light emitting assembly TOSA are sequentially connected;
the power distribution acquisition terminal converts the acquired power distribution information analog signal into a first digital signal and transmits the first digital signal to the optical receiver assembly ROSA;
the optical receiver assembly ROSA receives the first digital signal and sends the first digital signal to the limiting amplification circuit unit;
the amplitude limiting amplification circuit unit receives the first digital signal and amplifies and adjusts the first digital signal to obtain a second digital signal;
the amplitude limiting amplification circuit unit sends the second digital signal to the optical control unit;
the optical control unit receives the second digital signal, performs protocol conversion on the second digital signal according to a communication protocol of an optical fiber communication network to obtain an electric signal corresponding to the second digital signal, and outputs the electric signal to the optical drive unit;
the optical drive drives the optical transmitter optical subassembly TOSA to output an optical signal according to the electrical signal.
2. The optical communication module according to claim 1, wherein the limiting amplification circuit unit includes a first differential amplification circuit, a second differential amplification circuit, a signal detection circuit, and a bias control circuit,
the first differential amplifying circuit amplifies the input first digital signal and inputs the amplified first digital signal as a second differential signal to the second differential amplifying circuit;
the second differential amplifying circuit amplifies the second differential signal to obtain a second digital signal;
the signal detection circuit detects the second differential signal to obtain a detection result;
the bias control circuit adjusts the voltage of the first differential amplifying circuit according to the detection result.
3. The optical communication module of claim 2, wherein the first differential amplifier circuit comprises a first signal input, a second signal input, a first signal output, and a second signal output;
the second differential amplifying circuit comprises a third signal input end, a fourth signal input end, a third signal output end and a fourth signal output end, wherein the first signal output end is connected with the third signal input end, and the second signal output end is connected with the fourth signal input end;
the first signal output end is connected with the signal detection circuit through a first branch circuit, and the first branch circuit comprises a first capacitor;
the second signal output end is connected with the signal detection circuit through a second branch circuit, and the second branch circuit comprises a second capacitor;
the output end of the signal detection circuit is connected with the bias control circuit, and the output end of the bias control circuit is connected with the first differential amplification circuit.
4. The optical communication module according to claim 2 or 3, wherein the signal detection circuit detects an amplitude of the second differential signal;
the signal detection circuit determines a judgment result according to the amplitude and a preset threshold value;
and the signal detection circuit sends the judgment result to the bias control circuit.
5. The optical communication module of claim 4, the signal detection circuit being specifically configured to:
when the amplitude is greater than or equal to the preset threshold value, the judgment result is a first value, and the first value represents a detected signal; or, when the amplitude is smaller than the preset threshold, the judgment result is a second value, and the second value indicates that no signal is detected.
6. The optical communication module according to claim 5, wherein when the determination result is the second value, the amplification factor of the second differential amplifier circuit is smaller than the amplification factor of the second differential amplifier circuit when the determination result is the first value.
7. The optical communication module according to any one of claims 1 to 3, wherein an optical splitter and an optical path control switch are connected to the optical transmitter optical subassembly TOSA, the optical splitter being connected to the plurality of optical links through the optical path control switch, wherein the optical control unit is further configured to perform optical communication by controlling the optical path control switch to select one optical link among the plurality of optical links.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321691.1A CN114244441A (en) | 2021-11-09 | 2021-11-09 | Optical communication module for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111321691.1A CN114244441A (en) | 2021-11-09 | 2021-11-09 | Optical communication module for power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114244441A true CN114244441A (en) | 2022-03-25 |
Family
ID=80748822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111321691.1A Pending CN114244441A (en) | 2021-11-09 | 2021-11-09 | Optical communication module for power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114244441A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080152358A1 (en) * | 2006-12-26 | 2008-06-26 | Mitsubishi Electric Corporation | Light receiver |
| CN203774868U (en) * | 2013-12-24 | 2014-08-13 | 国家电网公司 | Power distribution information acquisition system and power distribution side information acquisition device thereof, and optical communication module |
| WO2020174628A1 (en) * | 2019-02-27 | 2020-09-03 | 三菱電機株式会社 | Limiting amplification circuit |
| CN113114367A (en) * | 2021-03-30 | 2021-07-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Modular high-density digital optical fiber satellite-borne transceiving equipment |
-
2021
- 2021-11-09 CN CN202111321691.1A patent/CN114244441A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080152358A1 (en) * | 2006-12-26 | 2008-06-26 | Mitsubishi Electric Corporation | Light receiver |
| CN203774868U (en) * | 2013-12-24 | 2014-08-13 | 国家电网公司 | Power distribution information acquisition system and power distribution side information acquisition device thereof, and optical communication module |
| WO2020174628A1 (en) * | 2019-02-27 | 2020-09-03 | 三菱電機株式会社 | Limiting amplification circuit |
| CN113114367A (en) * | 2021-03-30 | 2021-07-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Modular high-density digital optical fiber satellite-borne transceiving equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060239630A1 (en) | Optical fiber radio transmission system, transmission device, and reception device | |
| US9787395B2 (en) | Control apparatus and method for monitoring optical fiber link | |
| CN102204125B (en) | Optical receiver with threshold voltage compensation | |
| CN101860400A (en) | Optical receiver and method for optical reception | |
| US20200183108A1 (en) | Optical module | |
| JP2006507782A (en) | One weighted multi-input variable gain amplifier | |
| CN111193553A (en) | Light path insertion loss self-adaptive radio frequency optical receiver | |
| CN110730040B (en) | Low-speed communication method supporting wide dynamic receiving optical power range and optical module | |
| CN107017917B (en) | A kind of power amplifier method and apparatus of tri- frequency automatic identification of TD-LTE | |
| CN107863974A (en) | A kind of solid state transmitter prime network automatic switching control system | |
| CN114244441A (en) | Optical communication module for power transmission line | |
| CN210469327U (en) | Optical module supporting wide dynamic receiving optical power range | |
| CN110933535A (en) | Automatic screening method based on optical power abnormity of PON optical module | |
| CN111567003B (en) | Method and device for determining a signal modulation type, and arrangement of an amplifying unit | |
| CN111342907A (en) | Circuit with wireless optical communication signal diversity and incident light angle estimation functions | |
| JP4088679B2 (en) | Receiving method and receiving circuit | |
| CN101141203A (en) | Optical amplifier gain noise compensation apparatus and method for optical transmission system | |
| CN113949449B (en) | Photodiode detection circuit, optical module, monitoring system and monitoring method thereof | |
| CN108574534B (en) | Radar antenna received signal preprocessing device and preprocessing method | |
| CN114499561A (en) | Wireless communication receiver and automatic gain control device and control method thereof | |
| JPH11284460A (en) | Automatic gain control amplifier | |
| CN217590806U (en) | Signal transmission system based on photoelectric conversion | |
| JP2692652B2 (en) | Optical receiving circuit | |
| CN210867714U (en) | Light path insertion loss self-adaptive radio frequency optical receiver | |
| WO2005101702A1 (en) | Optical receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |